2023 Queen's Club Championships – Singles

Carlos Alcaraz defeated Alex de Minaur in the final, 6–4, 6–4 to win the singles tennis title at the 2023 Queen's Club Championships. By winning the title, Alcaraz reclaimed the ATP no. 1 singles ranking from Novak Djokovic. It was his first title on grass.

Matteo Berrettini was the two-time reigning champion, but withdrew before his first-round match.

Seeds
• # 🇪🇸 Carlos Alcaraz (champion)

• # Holger Rune (semifinals)

• # 🇺🇸 Taylor Fritz (second round)

• # 🇺🇸 Frances Tiafoe (second round)

• # 🇬🇧 Cameron Norrie (quarterfinals)

• # 🇮🇹 Lorenzo Musetti (quarterfinals)

• # 🇦🇺 Alex de Minaur (final)

• # 🇦🇷 Francisco Cerúndolo (second round)

Seeds
• # 🇺🇸 Tommy Paul (qualified)

• # 🇧🇬 Grigor Dimitrov (qualified)

• # 🇺🇸 J. J. Wolf (qualifying competition, lucky loser)

• # 🇫🇷 Arthur Fils (qualified, withdrew)

• # 🇫🇷 Constant Lestienne (first round)

• # 🇺🇸 Mackenzie McDonald (qualified)

• # 🇫🇷 Arthur Rinderknech (qualifying competition, lucky loser)

• # 🇦🇺 Alexei Popyrin (qualifying competition, lucky loser)

Qualifiers
• # 🇺🇸 Tommy Paul

• # 🇧🇬 Grigor Dimitrov

• # 🇺🇸 Mackenzie McDonald

• # 🇫🇷 Arthur Fils (withdrew)

Lucky losers
• # 🇺🇸 J. J. Wolf

• # 🇫🇷 Arthur Rinderknech

• # 🇦🇺 Alexei Popyrin